Notes

1. What is Java EE (Jakarta EE)

Java EE is a specification set for building enterprise-grade Java applications. These applications are:

• Scalable
• Multi-tier
• Modular
• Web-enabled

Java EE Includes:

• JDBC – for database connectivity
• Servlets – for handling HTTP requests
• JSP (JavaServer Pages) – to embed Java in HTML
• JSF (JavaServer Faces) – UI framework
• EJB (Enterprise Java Beans) – for business logic
• JPA (Java Persistence API) – ORM for database access

2. Web Application Layers Overview

Typical Layers:

Browser (Client)
↓
JSP / HTML (View Layer)
↓
Servlets (Controller)
↓
Business Logic (Service Layer)
↓
DAO / ORM (Database Access Layer)
↓
Database

Technologies Used:

• Frontend: HTML, JSP, JSF, Thymeleaf